\subsection{Commercial tools}
% Commercial tools in detail
% Topbraid Composer, Collibra, Ontoprise
Multiple commercial ontology editors have emerged over the years. Inferencing is a very important issue addressed by these products.
This section presents different ontology development environments of which the corresponding ontology editors are only a small part. 

\subsubsection{Topbraid Composer}
Implemented as an eclipse plug-in by TopQuadrant, the Topbraid Composer\footnote{\url{http://www.topquadrant.com/products/TB_Composer.html}} offers three different editions. It is part of the TopBraid suite, a set of semantic solution products that helps to built flexible applications from linked data models. One goal is to be compatible with and implement current W3C standards. 

\begin{itemize}
\item A free edition ships with RDFS, OWL and SPARQL support and the ability to define business and integrity rules using SPIN (SPARQL Inferencing Notation). 

\item The functionality is extended in the standard edition which contains a visual editor for RDF graphs and class diagrams as well as connectors to scalable database back ends (e.g. Jena SDB/TDB, AllegroGraph, Oracle 11g, Sesame). It is able to import and export to XML, Excel, RDBMs, etc. and supports, besides SPIN, different inference engines like Jena rules and SWRL.

\item Furthermore the top of the line maestro edition is optimized for developing web services and applications. It can execute scripts in SPARQLMotion, which is an RDF based scripting language with a graphical notation to describe data processing pipelines.

\end{itemize}

\subsubsection{Collibra}
Collibra's\footnote{\url{http://www.collibra.com/}} solution focuses on business driven SOA, data governance as well as semantic data integration. Their Business Semantics Management product suite consists of the Business Semantics Glossary (collaborative definition of business assets in their business context), Business Semantics Studio (semantic mappings for technical models and data sources), Business Semantics Enabler (data transformation and validation). 

Built on eclipse technology, the Business Semantics Studio enables the creation of facts and context by using the $\Omega$-RIDL \cite{ridl_omega} language and a visual as well as a textual editor. The export to W3C standards like RDF or OWL is however possible. 

\subsubsection{OntoStudio}
OntoPrise, the vendor of OntoStudio\footnote{\url{http://www.ontoprise.de/en/home/products/ontostudio/}}, claims that "[it] is the most widespread commercial modeling environment for the creation and maintenance of ontologies". The collaborative tool set integrates OntoBroker (for evaluating ontologies), SemanticGuide (semantic advisor system), SemanticMiner (semantic document search) and SemanticMiner for Sharepoint. 

In addition to OWL and RDFS the system supports RIF(Rule Interchange Format) and ObjectLogic. Furthermore OntoStudio is able to import UML 2.0, database schemas (Oracle, MS-SQL, DB2, MySQL), Excel tables, Outlook e-mails and folder structures of the file system. 
